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NITED STATES PATENT OFFICE.

JOSEPH R. PERRY, OF PORT CLINTON, PENNSYLVANIA.

JOINT FOR UNITING A MORTISING-CHISEL TO ITS MANDREL.

Specification of Letters Patent No. 16,020, dated November 4, 1856.i

To all whom t may concern.'

Be it known that I, Jos. R. PERRY, of the borough of Port Clinton,county of Schuylkill, and State of Pennsylvania, have invented a new anduseful Mode of Mortising; and I do hereby declare that the following isa full and clear and eXact description of the construction and operationof the niachine, in which- Figure l is a side elevation. A is a castiron frame, which is intendedto be bolted to a bench, as shown, by thebolts B B. rIhere are two rods C, C, passing down in front of saidframe, which support and on which slides a crosshead D. The cross headis moved up and down in mortising by a lever E, which accommodatesitself to the motion by rolling and sliding on said cross head, at F.The lever is fastened at one end only, by a pin marked G. The cross headis so made that a circular shaped end runs down below the lever, and ahole being bored out of it another circular piece is fitted into saidhole, into which the taper hole for receiving the chisel is made andturned by a small spring. It is the end running down, I the piece fittedinto it and K the spring which turns the chisel, or reverses it. Thepiece holding the chisel is held in its place as follows: A small grooveis turned out of the piece about inch deep and in. long or wide and acorresponding crease turned out of the other part. The piece then isinserted and a composition poured into said crease through a small holein the side of the cross head made for that purpose, thus forming acomplete swivel. A small notch filed out of the cross head admits thespring, in reversing it. L is a guide to regulate the face of piece tobe mortised, and may be moved up and down, or in and out, by a slot inthe frame and also a corresponding slot in the guide. The guide is heldto its place by a small bolt and thumbscrew, marked M. N, shows a pieceof stulf in a position for mortising, being an end view of the same.rIhe lever E, is constructed so that any length of lever may be used byattaching it with a bolt through a hole for that purpose or for applyingapitman when used with a foot or treadle. F ig. 2 represents a frontelevation of the same, the same letters referring to the same parts inboth views, but showing more distinctly the construction of guide andcross head. The cross head and lever is operated upon and sustained, bya spiral spring moving on one of the rods as shown, at letter O, andwhere a treadle is intended to be used must be strong enough to drawback the chisel. A small rod passes through the lugs of the frame and isheld by a thumbscrew at P, which rod is lowered or raised to suit widthof stuff. rIhe guide at L, is faced with a piece of wood driven into' adovetail cast on said guide, and represented by the red color. The leveris held to its place on the crosshead by a small plate and screw, asshown by the letter R in both elevations and is just loose enough toallow the necessary movement of the lever.

Vhat I claim as my invention and desire to secure by Letters Patent is-Securing the revolving chisel-socket J, to the cross head or cap H bygrooving both in the manner described and fitting the annular space thuscreased with a metallic composition as herein specified.

. JOS. R. PERRY.

Witnesses present:

EDWARD BOYER, HENRY BOYER.

